Gather your skillet, a spatula, and a small bowl, then thinly slice the garlic cloves. The garlic should smell pungent and slightly spicy.
Heat the skillet over medium-high heat until it shimmers, then add 1 to 2 tablespoons of olive oil, swirling to coat evenly. You should hear a gentle sizzle.
Add the sliced garlic to the hot oil and cook for about 30 seconds, stirring constantly. The garlic will turn fragrant and start to crackle, releasing a smoky aroma.
Immediately toss in the fresh spinach, pressing it down gently into the skillet. Stir quickly to coat the leaves in garlic oil; they will wilt almost instantly, turning bright green and silky.
Continue stirring for about 1–2 minutes until the spinach is tender, glossy, and fully wilted, with the garlic golden and fragrant. The greens should be vibrant and slightly shrunken.
Remove the skillet from heat, then squeeze a wedge of lemon over the greens for a bright contrast. Add a pinch of red pepper flakes and salt to taste, stirring briefly to combine.
Transfer the fragrant greens to a serving plate. The final dish should be tender, silky, and bursting with smoky garlic aroma, ready to be enjoyed immediately.